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. 2016 Feb 3;18:39. doi: 10.1186/s13075-016-0927-z

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© Alivernini et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Cluster of differentiation 68 (CD68), CD20 and CD3 immunohistochemical staining of synovial tissue (ST) of patients with rheumatoid arthritis (RA) in clinical remission after undergoing therapy with tumour necrosis factor-α blockers. Five synovial hypertrophy–positive/power Doppler–negative patients with RA underwent ultrasonography-guided knee ST biopsy at study entry. a CD68 immunohistochemical staining of ST (original magnification, ×40). b CD20/CD3 double immunohistochemical staining of ST [CD20 diaminobenzidine (brown) and CD3 (red); original magnification, ×40]